Top

International Ophthalmology

Published in:

01-08-2020 | Original Paper

Intraocular lens power calculation in a posterior chamber phakic intraocular lens implanted eye

Authors: Dilek Yaşa, Bülent Köse, Mehmet Emin Sucu, Alper Ağca

Published in: International Ophthalmology | Issue 8/2020

Abstract

Purpose

To evaluate the effect of Eyecryl posterior chamber phakic intraocular lens (pIOL) on axial length measurement and intraocular lens power calculation.

Methods

Axial length (AL), keratometry (K), and IOL power calculations were compared at monthly preoperative and postoperative visits (preoperative vs 1-month). Preoperative IOL power (calculated using preoperative K and AL) was compared with a re-calculation where the pIOL was assumed to be in the posterior chamber (calculated using preoperative K value and postoperative AL).

Results

Thirty-nine eyes of 39 patients were included. The mean preoperative AL and postoperative AL were 27.02 ± 1.50 and 27.17 ± 1.52 mm (p < 0.001), respectively. The mean preoperative and recalculated IOL powers to achieve emmetropia were 9.40 ± 3.35 and 8.98 ± 3.37 D (p < 0.001) with SRK-T formula, 8.82 ± 3.54 and 8.47 ± 3.60 (p = 0.02) with Holladay I formula, and 9.78 ± 3.43 and 9.44 ± 3.50 (p = 0.013) with Hoffer Q formula.

Conclusion

The presence of Eyecryl pIOL in the posterior chamber results in a small increase in the AL measurement, and this might result in a corresponding hypermetropic shift in the desired refraction.

Coskunseven E, Balci Ö, Atun S (2009) Phakic refractive lens implantation in highly myopic and hyperopic eyes: two-years follow-up. Turk J Ophthalmol 39:23–26

Sorgun Evcili P, Söğütlü Sarı E, Kubaloğlu A et al (2012) Results of posterior chamber lens implantation for correction of myopia. Turk J Ophthalmol 42:349–354CrossRef

Choi JH, Lim DH, Nam SW et al (2019) Ten-year clinical outcomes after implantation of a posterior chamber phakic intraocular lens for myopia. J Cataract Refract Surg 45:1555–1561. https://doi.org/10.1016/j.jcrs.2019.06.015 CrossRefPubMed

Guber I, Mouvet V, Bergin C et al (2016) Clinical outcomes and cataract formation rates in eyes 10 years after posterior phakic lens implantation for myopia. JAMA Ophthalmol 134:487–494. https://doi.org/10.1001/jamaophthalmol.2016.0078 CrossRefPubMed

Liang GL, Wu J, Shi JT et al (2014) Implantable collamer lens versus iris-fixed phakic intraocular lens implantation to correct myopia: a meta-analysis. PLoS ONE 9:e104649. https://doi.org/10.1371/journal.pone.0104649 CrossRefPubMedPubMedCentral

Amro M, Chanbour W, Arej N et al (2018) Third- and fourth-generation formulas for intraocular lens power calculation before and after phakic intraocular lens insertion in high myopia. J Cataract Refract Surg 44:1321–1325. https://doi.org/10.1016/j.jcrs.2018.07.053 CrossRefPubMed

Pitault G, Leboeuf C, les Jardins Leroux S et al (2005) Optical biometry of eyes corrected by phakic intraocular lenses. J Fr Ophtalmol 28:1052–1057. https://doi.org/10.1016/s0181-5512(05)81137-4 CrossRefPubMed

Yasa D, Urdem U, Agca A et al (2018) Early results with a new posterior chamber phakic intraocular lens in patients with high myopia. J Ophthalmol. https://doi.org/10.1155/2018/1329874 CrossRefPubMedPubMedCentral

Vasavada V, Srivastava S, Vasavada SA et al (2018) Safety and efficacy of a new phakic posterior chamber iol for correction of myopia: 3 years of follow-up. J Refract Surg 34:817–823. https://doi.org/10.3928/1081597X-20181105-01 CrossRefPubMed

10.

Urdem U, Agca A (2019) Refractive results and endothelial cell density after eyecryl phakic intraocular lens implantation. Beyoglu Eye J 4:17–22. https://doi.org/10.14744/bej.2019.52824 CrossRef

11.

Faul F, Erdfelder E, Lang AG et al (2007) G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods 39:175–191. https://doi.org/10.3758/bf03193146 CrossRef

12.

Olsen T (2007) Calculation of intraocular lens power: a review. Acta Ophthalmol Scand 85:472–485. https://doi.org/10.1111/j.1600-0420.2007.00879.x CrossRefPubMed

13.

Sanders DR, Retzlaff JA, Kraff MC et al (1990) Comparison of the SRK/T formula and other theoretical and regression formulas. J Cataract Refract Surg 16:341–346. https://doi.org/10.1016/s0886-3350(13)80706-7 CrossRefPubMed

14.

Hoffer KJ (1993) The Hoffer Q formula: a comparison of theoretic and regression formulas. J Cataract Refract Surg 19:700–712. https://doi.org/10.1016/s0886-3350(13)80338-0 CrossRefPubMed

15.

Haigis W (2001) Pseudophakic correction factors for optical biometry. Graefes Arch Clin Exp Ophthalmol 239:589–598. https://doi.org/10.1007/s004170100323 CrossRefPubMed

16.

Sanders DR, Bernitsky DA, Harton PJ Jr et al (2008) The Visian myopic implantable collamer lens does not significantly affect axial length measurement with the IOLMaster. J Refract Surg 24:957–959. https://doi.org/10.3928/1081597X-20081101-17 CrossRefPubMed

17.

Yu A, Wang Q, Zhu S et al (2015) Effects of posterior chamber phakic intraocular lens on axial length measurements. Zhonghua Yan Ke Za Zhi 51:206–209PubMed

18.

Shin JY, Lee JB, Seo KY et al (2013) Comparison of preoperative and postoperative ocular biometry in eyes with phakic intraocular lens implantations. Yonsei Med J 54:1259–1265. https://doi.org/10.3349/ymj.2013.54.5.1259 CrossRefPubMedPubMedCentral

19.

Eibschitz-Tsimhoni M, Tsimhoni O, Archer SM et al (2008) Effect of axial length and keratometry measurement error on intraocular lens implant power prediction formulas in pediatric patients. J AAPOS 12:173–176. https://doi.org/10.1016/j.jaapos.2007.10.012 CrossRefPubMed

20.

Borasio E, Mehta JS, Maurino V (2006) Torque and flattening effects of clear corneal temporal and on-axis incisions for phacoemulsification. J Cataract Refract Surg 32:2030–2038. https://doi.org/10.1016/j.jcrs.2006.09.010 CrossRefPubMed

21.

Morlet N, Minassian D, Dart J (2001) Astigmatism and the analysis of its surgical correction. Br J Ophthalmol 85:1127–1138. https://doi.org/10.1136/bjo.85.9.1127 CrossRefPubMedPubMedCentral

22.

Haigis W, Lege B, Miller N et al (2000) Comparison of immersion ultrasound biometry and partial coherence interferometry for intraocular lens calculation according to Haigis. Graefes Arch Clin Exp Ophthalmol 238:765–773. https://doi.org/10.1007/s004170000188 CrossRefPubMed

23.

Barrett GD (2019) Barrett universal II formula. https://calc.apacrs.org/barrett_universal2105/. Accessed 12 Dec 2019

Title: Intraocular lens power calculation in a posterior chamber phakic intraocular lens implanted eye
Authors: Dilek Yaşa
Bülent Köse
Mehmet Emin Sucu
Alper Ağca
Publication date: 01-08-2020
Publisher: Springer Netherlands
Published in: International Ophthalmology / Issue 8/2020
Print ISSN: 0165-5701
Electronic ISSN: 1573-2630
DOI: https://doi.org/10.1007/s10792-020-01377-6

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Intraocular lens power calculation in a posterior chamber phakic intraocular lens implanted eye

Abstract

Purpose

Methods

Results

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Please log in to get access to this content

Other articles of this Issue 8/2020

Efficacy of navigated focal laser photocoagulation in diabetic macular edema planned with en face optical coherence tomography versus fluorescein angiography

Hyperopic laser keratorefractive surgery: Do steep corneas have worse outcomes?

Swept-source optical coherence tomography angiography alleviates shadowing artifacts caused by subretinal fluid

Predictive factors for the IOP reduction in phacocanaloplasty with suprachoroidal drainage

A comparison of the effects of different cap thicknesses on corneal nerve destruction after small incision lenticule extraction

Chronically retained feathery chestnut-burr spine-related corneal injury: clinical features and outcome